| 摘要 |
<p>PURPOSE:To measure the connecting resistance between a winding and a commutator piece simply without cutting the winding of an armature, and to measure even a single winding resistance. CONSTITUTION:A constant current 1a is allowed to flow by making the first switch Sw1 ON, and the second switch Sw2 OFF, and the voltages Va1, Vb1, and Vc1 between neighboring commutator pieces C1 and C2, C2 and C3, and C9 and C10 are measured by voltage measuring devices 33, 34, and 35. Then, the generating voltages are controlled to make the voltage Vb2 measured by the voltage measuring device 34 equal to the voltage Vb1, by a voltage generator 32 making the ON and OFF of the switches Sw1 and Sw2 reverse, the voltages Va2 and Vc2 are measured again by the voltage measuring devices 33 and 35, and the connecting resistance RC1 of an armature 30 is calculated from the relational expression C1=(Va1-Va2)/1a, and the winding resistance RL1 is calculated from the relational expression RL1=Va2(Vc1+Vc2)/1a.Vc2, which are led by using the Ohm's law respectively.</p> |
